969 results about "Quality measurement" patented technology

A method and system for orthodontic treatment planning, evaluation and quality measurement is provided comprising a workstation having computing platform, a graphical user interface, a processor and a computer storage medium containing digitized records pertaining to a patient. The digitized records include image and other types of data. The computer storage medium further includes a set of software instructions providing graphical user interface tools for providing a user with access to the digitized records for planning orthodontic treatment of a patient. Also provided are reference databases for aiding in the decision process during treatment selection, treatment planning and treatment delivery and progress monitoring and evaluation. Also provided are parameter or criteria measurement techniques and generally acceptable thresholds, which can be updated through learning process and through acquisition of patient data. Once the treatment is planned, the virtual dentition model of the patient in the proposed treatment set-up or the target state is evaluated using several virtual model evaluation features and criteria.

Systems and methods for routing packets by nodes in an ad hoc network in accordance with a link quality source routing protocol are disclosed. Route discovery, route maintenance, and metric maintenance are designed to propagate and keep current link quality measurements. Metric maintenance includes a reactive approach for links that a node is currently using to route packets, and a proactive mechanism for all links. Nodes are configured to include a send buffer, a maintenance buffer, a request table, link quality metric modules, and preferably a neighbor cache and a link cache. The invention allows for asymmetric links in the network. The invention may be implemented within a virtual protocol interlayer between the link and network layers. The invention may employ any particular link quality metrics, including metrics based on probing techniques as well as metrics based on knowledge gained in other ways.

A biosensor array, system and method for affinity based assays that are able to simultaneously obtain high quality measurements of the binding characteristics of multiple analytes, and that are able to determine the amounts of those analytes in solution. The invention also provides a fully integrated bioarray for detecting real-time characteristics of affinity based assays.

A QoS routing apparatus as a node of a logical network to transmit data communicated between user's terminals comprises a relay unit discriminating whether or not flows of received data are measurement flows and transmitting said received data, a quality measurement unit measuring communication quality of links connected the own apparatus using the measurement flows, a quality accuracy setting unit determining measurement accuracy of the communication qualities of the respective links and a path setting unit prescribing transmission amounts of the measurement flows to the respective links. When the path setting unit prescribes the transmission amounts of the measurement flows, it applies a higher rate to a link which has been determined a lower measurement accuracy.

A measurement apparatus for measuring traffic of packets with high time resolution is provided. The measurement apparatus includes an accumulation part for accumulating packet lengths of packets having predetermined header information in successively received packets, and storing an accumulated value of the packet lengths in a storage; and a periodic reading part for reading the accumulated value from the storage at predetermined time intervals, and outputting the accumulated value.

Improved pilot signal sequences which facilitate multiple channel quality measurements, e.g., through the use of different signal pilot transmission power levels, are described. In various implementations the transmitted pilot sequences facilitate determining the contribution of interference from other sectors of a cell using the same tones, e.g., in a synchronized manner, as the sector in which the pilot signal measurements are being made. To measure noise contributions from neighboring sectors a sector NULL pilot, e.g., a pilot with zero power, is transmitted in an adjacent sector at the same time a pilot signal with a pre-selected, and therefore known, non-zero power is transmitted in the sector where the received pilot signal measurement is made. To facilitate background noise measurements, a cell NULL is supported in some embodiments. In the case of a cell NULL, all sectors of a cell transmit a Null pilot, on a tone that is used to measure background noise. Since no power is transmitted in the cell on the tone during the measurement, any measured signal on the tone is attributable to noise, e.g., background noise which may include inter-cell interference.

An authentication system incorporates pluralilty of fused biometric modalities which are combined with quality indicia of the biometric samples. Fusion processing maps individual modality data along with one or more quality measurements to a fused score for purposes of making an authentication decision.

In a system having a base station transmitter for transmitting data blocks to one or more mobile stations over a radio link, there is a method for determining an uplink transmit power level at which to transmit a current data block over a radio link from the mobile to the base transmitter station. The method evaluates airlink quality measurements in the radio link over a measurement interval, wherein each time a message is sent to the mobile station, it is evaluated whether a specified number of uplink blocks have been transmitted by the mobile station since the start of the measurement interval. Based on the evaluated airlink quality measurement, the method determines the uplink transmit power level that the mobile should be using for the current block, and adjusts the transmit power level, if necessary, for the current block.

Base stations transmit strip signals using strip signal segments and self supporting modulation scheme techniques facilitating rapid channel estimate. A strip segment occupies one OFDM symbol time interval and uses a set of downlink tones; some, e.g., half, of the tones are left unused facilitating SIR measurement. The strip segments are advantageously timed to correspond to uplink access intervals in which connected wireless terminals do not typically transmit uplink signals. Connected wireless terminals including: multiple antennas used in combination, an antenna duplex module, single RF receiver chain and single RF transmitter chain, switch antenna coefficient combinations based on strip signal segment timing. The wireless terminal determines an independent downlink channel quality measurement, e.g., SNR and/or SIR for each strip signal segment and for on-going non-strip signaling. The wireless terminal compares channel quality measurements and selects an antenna coefficient combination to be used during non-strip signaling intervals obtaining very good antenna gain.

The subject innovation provides for systems and methods to facilitate weighted suffix tree clustering. Conventional suffix tree cluster models can be augmented by incorporating quality measures to facilitate improved performance. Further the quality measure can be employed in determining cluster labels that show improvements in accuracy over conventional means. Additionally “stopnodes” can be defined to facilitate traversing suffix tree models efficiently. Quality measurements can be determined based in part on weighting factors applied to terms in a vector model, said terms being mapped from a suffix tree model.

PCT No. PCT/US97/04906 Sec. 371 Date Oct. 21, 1997 Sec. 102(e) Date Oct. 21, 1997 PCT Filed Mar. 27, 1997 PCT Pub. No. WO97/43835 PCT Pub. Date Nov. 20, 1997An apparatus and method for recovering from read errors detected by a read channel (70) in a sequence of data read from a disc (18) of a disc drive (10) by using read channel quality indicators to determine the appropriateness of using error correction in combination with other corrective actions utilized in the recovery process. Upon the detection of an uncorrected error in the retrieved data, the disc drive (10) enters a read error recovery routine wherein one or more corrective actions (102, 122) are applied in an effort to resolve the error. One of the channel quality indicators comprises a channel quality measurement (108, 128) determined as the sum of the square of the sampled data bit error values recovered during the read operation. When the channel quality measurement is at or below a threshold value indicative that the probability of passing undetected erroneous data is at an acceptable level (110, 130), error correction is applied to the data (112, 138); otherwise, error correction is disallowed (118, 140). Additional channel quality indicators comprise erasure pointers (132) which identify a particular set of symbols that are suspected of containing a read error. In such a case, the disc drive determines that the total number of symbols identified by the erasure pointers is below a predetermined erasure threshold before applying error correction (134, 136, 138), the erasure threshold selected to be within the correction capability of error correction circuitry 90.

Methods and apparatus are described for enabling downlink transparent relay in a wireless communication network. In a wireless communications network, a base station and a mobile station may communicate with each other via a relay station, as needed. Transparent relay may allow for relay communication between a base station and a mobile station although the mobile station is unaware of the relay station. However, non-contiguous transmission of a relay station may lead to channel quality measurement and channel estimation degradation during downlink transparent relay. According to some aspects, a base station may schedule a mobile station to a transmission mode that utilizes dedicated pilot signals for downlink transparent relay, and a relay station may transmit data and dedicated pilot signals over the same channel resources as the base station. According to some aspects, the relay station may null common pilot signals transmitted by the base station.

In a system having a base station transmitter for transmitting data blocks to one or more mobile stations over a radio link, a method for determining a transmit power level at which to transmit a current block. A quality measurement is received from a mobile station indicating an average radio link quality over a previous group of blocks, wherein not all of the blocks of the previous group of blocks were necessarily transmitted at the same transmit power level. A transmit power attenuation level is determined for the current block based on the quality measurement. The transmit power attenuation level is subtracted from the initial transmit power level to determine the transmit power level for the current block.

The invention relates to methods for determining the interference variability of a precoding matrix set, and the use of same for purposes of scheduling and precoding matrix set selection. The precoding matrix set used by an interferer base station is evaluated by the mobile terminal which experiences the intercell interference from the interferer base station. The mobile terminal is informed about the precoding matrices of the precoding matrix set used by the base station. The mobile terminal measures the radio channel to the interferer cell, and then estimates based on the measured radio channel and with the knowledge on the particular precoding matrices of the precoding matrix set, the interference variability of the precoding matrix set. The interference variability may be reported to the serving base station of the mobile terminal, and thus considered for scheduling decisions by the serving base station referring the mobile terminal.

An Ethernet metric system and methodology which provides comparable measurements over a data link layer for use in network engineering and Service Provider (SP) performance monitoring. The Ethernet metric system of the present invention utilizes a measurement appliance known as a nodal member for measuring various Ethernet and IP metrics. A plurality of nodal members is used to make one-way or round-trip measurements over asymmetrical paths. The system includes a database for storing measurement data recorded by the plurality of nodal members. A workstation is also contemplated to facilitate system configuration and reporting of measurement data. The system further includes at least one service daemon for interfacing between the plurality of nodal members and the database. Additionally, the service daemon instructs the plurality of nodal members to create vectors and obtain vector configuration from the database. The service daemon processes results data transmitted from the nodal members to the database.

A method for measuring/reporting a channel quality in a broadband wireless access communication system. The method for reporting channel qualities of active BS and neighbor BSs measured by an MSS to the active BS when the MSS exists in a specific area covered by the active BS and neighbor BSs in a communication system includes the steps of: a) receiving channel quality report information indicative of channel periods of the channel qualities from the active BS, and receiving channel quality measurement information associated with individual channel qualities of the neighbor BSs and the active BS from the active BS; b) measuring SINRs of the neighbor BSs and the active BS according to the channel quality measurement information; and c) reporting the measured SINRs of the neighbor BSs and the active BS to the active BS.

A system, method, and computer readable medium for provisioning communication services by an IP-based femtocell network is provided. Service of a user equipment may be transferred from one femtocell to another femtocell via a femtocell handoff procedure. Femtocell systems of the femtocell network perform link quality measurements and may distribute the link quality measurements to neighbor femtocells. A femtocell system may periodically evaluate the link quality with the user equipment. If an evaluation is made that the user equipment needs to be transferred to another site, the servicing femtocell site may evaluate the most recent link quality measurements received from neighboring femtocell sites and select a femtocell site for handoff. In the event that the femtocell network is deployed in an area serviced by a macrocellular network, handoff routines may provide preference for transferring the user equipment to a target femtocell system rather than a macrocell site.